XTRs work very well, but I've found the outers are a bit brittle and split easily.

Goodridge work well and are basically a fully sealed system, although the thin sheath that covers the exposed section of cable on the sets I've bought has been blue. The outers match Goodridge brake hose quite well though...

Nokons are silly light, but apparently creak and are expensive.

What about Powercordz? Even sillier lighter and even more expensiver...

I-links are cheaper, lighter, easier to fit and less creaky (you're in the minority Andy) than Nokons!

Powercordz inners aren't bad, but the consensus seems to be to avoid the newer 1.2mm ones, once clamped the coating comes off, so if you need to adjust the pinch bolt or owt it's very difficult. The older 1.5mm ones are more durable. Again, I'm not sure I'd bother in the future!